Randing machine



July 6, 1937. w. c. CARD, JR 2,086,352

RANDING MACHINE Filed May 29, 1934 2 Sheets-Sheet l 4145 48 45 .i l 61 33.9 T

INVENTOR W July 6, 1937.

w. C. CARD, JR

RANDING MACHINE Filed May 29, 1934 2 Sheets-Sheet 2 QQQQQQQ INVENTOR"I/IIA BY ,4? I

M 6 ATTORNEYS Patented July 6, 1937 UNITED STATES PATENT OFFICE RANDINGMACHINE Application May 29, 1934, Serial No. 728,085

8 Claims.

This invention relates to randing or cutting machines which are usefulchiefly in shoe manufacturing operations.

An object of the present invention is to provide a machine for makingone of the cuts for severing the complementary insoles and outsolesshown in U. S. Patents Nos. 1,838,708 and 1,902,725 issued to F. Sbicca.In accordance with the showingin those patents, insoles and outsoles arecut from a single piece of stock in such a manner as to form an insolehaving a perforate forepart and an outsole having its forepart landed tomate with or complement the insole. One method of forming these partsinvolves making a series of cuts in the stock, and the machine of thepresent invention is primarily adapted to make a randing cut around theforepart of this stock so as to separate the insole and outsole whilemaking the described perforate and landed portions.

While the present invention accordingly is primarily useful in the abovemanner, certain benefits thereof may be obtained generally in otherranding or channeling operations. It is therefore contemplated that itmay be used in any such operation to which its nature adapts it.

Further objects of the invention are to provide a machine of this kindwhich is rugged and eflicient in its operation and with which theoperator can readily perform the required operations.

Other objects of the invention will in part be obvious and will in partappear hereinafter.

The invention accordingly comprises the features of construction,combination of elements, and arrangement of parts, which will beexemplified in the construction hereinafter set forth and the scope ofthe application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawings, in which:

Fig. 1 is a front elevation of the working head of a machine embodyingfeatures of the invention;

Fig. 2 is a top plan view of the machine shown in Fig. 1;

Fig. 3 is a horizontal sectional view substantially corresponding toline 3-3 of Fig. 1;

Fig. 4 is a side elevation of the machine of Fig. 1 when viewed from theleft in that figure;

Fig. 5 is a vertical sectional view taken sub- 'stantially along line5-5 of Fig. 1;

Fig. 6 is a side elevation of the machine shown in Fig. 1 as viewed fromthe right in that figure;

Fig. 7 is a fragmentary detailed perspective view showing therelationship of certain parts of the machine;

Fig. 8 is a fragmentary perspective view of a randing knife viewed fromits under side;

Fig. 9 is a perspective view representing the operation of the cuttingknife on a piece of work stock;

Fig. 10 is a fragmentary perspective view further illustrating therelationship of the cutting knife to the material on which it works; and

Fig. 11 is a fragmentary sectional View taken through the edge portionof a piece of stock and showing the cutting position of the knifetherein.

In using the present machine a piece of rounded outsole stock isprovided having a thickness equal to the combined thickness of anoutsole and insole. This stock is first given a beveled slash along itsball line as shown at A in Figs. 9 and 10. This slash may be performedby suitable machinery such as that described in my copending applicationSerial No. 729,403. The stock is then split from the heel up to slash A.This split is indicated at B in Fig. 9, and may be performed by anysuitable leather splitting device. The stock is then ready to beoperated on by the present machine, which has a knife that is insertablein the split B and is formed so as to cut around the forepart of thesole stock along a horizontal plane C (Fig. 11) and an inclined plane D,these two outs serving to free the insole from the outsole and at thesame time to leave perforate the central forepart portion of the insoleand to leave a complementary raised or landed portion on the outsole.

Referring more particularly to the drawings, there is shown a cast headI0 which is mounted on a suitable pedestal l I so as to be brought to aconvenient height for the operator, who stands directly facing themachine as it is illustrated in Fig. 1. Extending rearwardly from headI0 is an integral support for a knife holder bracket l2. Bracket I2 isfastened to such integral support by suitable screws 13 and has a splitbushing l4 depending from its lower portion. A threaded bolt l5 servesto clamp this bushing about the cylindrical tail iii of a knife holder[1. Aknife I8 is mounted on this holder by means of a screw l9 (Fig. 3)which is threaded into the holder through an elongate knife slot 20. Bymeans of this construction the knife can be adjusted in two directionsby means of screws I5 and I9, which are adapted to hold it fixed withreference to the cast head l0.

This knife is so configured that it is adapted to effect the abovedescribed randing cuts. It has two cutting faces at an angle to eachother, namely, the horizontal portion 21 which is adapted to cutinwardly from the edge of the stock, and the inclined portion 22 whichcuts from this first named cut upwardly to the upper surface of the I'work is applied to the knife in the manner shown in Figs. 9, 10 and 11the required cuts are made by respective edges 2| and 22.

Means are provided for feeding and guiding the work to this knife. Thismeans includes a constantly rotating pulley 24 which is freely rotatableon the hub 25 of a friction wheel 26, which in turn is keyed to arotatable shaft 21. This shaft is rotatably journaled in the head In at28 and 29. A spring 36 normally separates pulley 24 and friction wheel26. The hub of the pulley has a freely slidable sleeve 3| abutting it.This sleeve is freely mounted on friction wheel hub 25 and has an outerbeveled or wedge-shaped face 32. A crank arm 33 is affixed to theprojecting outer end of shaft 21 and has a hand operated lever 34pivoted thereto at 35. This lever is equipped at its outer end with ahandle 36 and at its opposite end beyond pivot 35 hasa wedge-faced tail31 which is adapted to slide against the wedge face 32 of sleeve 3|. Bymeans of this construction movement of the handle 36 in a clockwisedirection (Fig. 6) causes the wedge face at 31 to force sleeve 3|inwardly, and this in turn forces the constantly rotating pulley 24 intocontact with the friction wheel 26, thus effecting rotation of the shaft21. As shaft 21 thus is positively actuated by the driving pulley, crank33 and its associated lever 34 and handle 36 are carried around with it.During operation of the machine, the operator may permit his hand tofollow the movement of handle 36 and may disengage wedge 31 frompressing engagement against sleeve 3| at any time so that the powerdriving of shaft 21 may be discontinued and resumed at will.

Shaft 21 carries a driving gear 38 which meshes with a gear 39 on ashaft 40. This shaft is rotatably mounted on journals 4| and 42 formingpart of a movable strap member 43. This strap member is pivotallymounted on head I0 at 44 and has its forward end adjacent journal 4|accommodated between two upstanding guideways 45 and 46 which are formedintegrally with head In. Pivoted strap'43 is normally urged down towardhead ID by means of a rod 41 which is pivotally attached thereto bymeans of a pin 48 passing through the body of the strap and through aloose-motion slot in the head of the rod 41. Near its lower end rod 41has a spring seat or collar 49 attached thereto. Between collar 49 and aspring seat portion 50 of head I0 is extended a compression spring 5|.The downward limit of movement of strap 43 is controlled by a stop screw52 which is adapted to abut a lug 53 carried by the strap. Rod 41 isadapted to be elevated so as to move strap member 43 and its appurtenantparts, hereinafter to be described, away from head H) by means of abell-crank lever 54 which is pivotally mounted on head ID at 55. One armof this lever underlies collar 49, and the other arm has a rod 56depending therefrom which is adapted to be operated by a suitabletreadle (not shown), depression of which is effective to cause thedesired elevation of rod 41.

A work engaging feed wheel 51 is keyed to the left or outer end of shaft40, and is adapted to be rotated by such shaft so as to force worktoward the knife I8.

A presser foot 56 lies behind feed wheel 51 and is vertically adjustableon strap 43. The adjustable mounting for this presser involves a screw59 passing through an elongate slot 60 and threaded into a portion ofstrap member 43, together with a vertical adjusting screw 6| which has aflange 62 slidable in a groove in the up- I per end of the presser foot.The foot 58 is vertically located so as to bear against work which isbeing fed under the wheel 51 so as to prevent pressure of such wheelfrom curling up the edge of the work. If desired, the foot 58 may begiven a forked construction (not shown) so as to extend on both sides ofthe wheel 51.

A circular work support 63 is arranged to support work beneath the feedwheel and the cutting knife. This work support has a verticallyextending spindle 64 (Fig. l) which is freely rotatable in a verticallyadjustable bushing 65, the upper end of which is expanded to provide asocket 66 for a ball bearing race 61 on which the work support 63 rests.The expanded upper end of bushing 65 also includes a. projection 68which provides a mounting for an edge gage 69. The vertically adjustablebushing 65 is slidably mounted in a socket 10 which is integral withhead It], and rotation of the bushing with respect to such socket isprevented by means of a screw 1| the inner end of which projects withina vertical groove 12 in the side of the bushing. An adjusting screw 13extends through the bottom of socket 10 and is freely rotatable thereinat 14, while being restrained from vertical movement with respectthereto by means of a collar 15 and a hand wheel or knob 16 which iskeyed to the lower end thereof. The upper face of this knob has a numberof recesses, one of which is illustrated at 11, into which a springpressed detent 18 may be selectively positioned for holding the knob inany adjusted position. The upper end of adjusting screw 13 is threadedinto the lower end of bushing 65 so that rotation of the screw 3 effectsvertical movement of the latter, and the extent of this verticalmovement may be controlled at detent 18, the distance between adjacentrecesses 11 preferably corresponding to some fractional value of an ironin the vertical displacement of work support 63. The vertical axis ofwork support 63 is offset with respect to the axis of feed wheel 51 asis shown at O in Fig. 2, the relationship being such that the feed wheelaxis is located in advance of the support axis with reference to thedirection of feeding movement. As a consequence, the feed wheel isadapted to contact work seated on the support at a point in advance ofthe support axis so that the feeding movement of the wheel and therotational movement of the support give the work a complement of motiontoward the edge gage 69 so that the edge of the work always has atendency to contact this gage during the feeding and cutting operation.The work contacting portion of the gage is located almost opposite, butpreferably a little in advance of the axis of the work support, whilethe knife edge at 2| is positioned just beyond this axis, as is shown inFigs. 3 and 4. This arrangement effects more or less automaticpositioning and feeding of the work with reference to the fixed knife,and minimizes the amount of control required of the operator.

In the operation of the machine, the operator is provided with a roundedsole blank previously slashed and split at A and B. The operatordepresses the foot treadle connected with rod 56 and thus elevates thefeed wheel and presser foot with respect to the work support so as topermit insertion of the work between these parts. The knife I8 isinserted in the split B between the insole and outsole portions of theblank and the latter is placed in edge contact with edge gage 69. Thefoot treadle is then released allowing spring 5| to clamp the feed wheelthereagainst, the presser the friction wheel 26 as explained above.

foot acting to prevent upward curling of the work which might otherwiseattend the considerable pressure exerted by the feed wheel. With theblank thus positioned, the operator pulls handle 36 in a clockwisedirection, as viewed in Fig. 6, causing lever 34 to pivot at- 35 so thatthe wedge face at 31 forces constantly rotating pulley 24 against Thisimparts positive driving motion to the shaft 21 and consequently to thefeed Wheel 51 which directs work toward the cutting knife, thuseffecting the desired randing operation. During the feeding movement thehandle 36 rotates with shaft 21 and the operator keepssuch handle withinhis grasp, following its movement as the feeding operation progresses.As long as he allows the handle and associated lever 34 to keep pacewith the movement of shaft 21, the driving connection is maintained, butif he desires to discontinue the feeding operation he may move or retardthe lever 34 so as to withdraw wedge face 31 from contact with wedgeface 21, thus permitting spring 30 to become effective in separating thedriving pulley and the friction wheel. It will be seen that by means ofthis construction the feeding movement may be kept under constantcontrol and may be readily interrupted andresumed at will.

It will be seen that there has been provided a randing or cuttingmachine which is well suited to fulfill its intended functions. Sincecertain changes may be made in the above construction and differentembodiments of the invention could be made without departing from thescope thereof, it is intended that all matter contained in the abovedescription or shown in the accompanying drawings shall be interpretedas illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention which, as amatter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to'secureby Letters Patent, is:

1. A machine for operating on rounded sole blanks comprising a head, acircular work support freely rotatable thereon about a vertical axis, adevice for operating on the marginal portion of a rounded blank mountedon said head above said support, an edge gage adjacent said support, anda driven feed wheel rotatably mounted on said head about a horizontalaxis in position to contact work seated on said support, the axis ofsaid feed wheel being located in advance of the work support axis.

2. A machine for operating on rounded sole blanks comprising a head, acircular work support freely rotatable thereon about a vertical axis, adevice for operating on the marginal portion of a rounded blank mountedon said head above said support, an edge gage adjacent said support, adriven feed wheel pivotally mounted on said head, and means for clampingsaid feed wheel against work seated on said support at a contact pointlocated in advance of the axis of the work support.

3. A machine for operating on rounded sole blanks comprising a head, acircular work support freely rotatable thereon about a vertical axis, adevice for operating on the marginal portion of a rounded blank mountedon said head above said support, a member pivotally mounted on saidhead, a driven feed wheel mounted on said member, and spring meansacting on said member normally to hold said wheel in contact with workseated on said support, said wheel being positioned to contact such workat a point in advance of the axis of the work support.

4. A machine of the class described comprising a head, a circular worksupport freely rotatable thereon, a knife adjacent saidsupport, a memberpivotally mounted on said head, a driven feed wheel carried by saidmember, spring means urging said wheel into contact with work on saidsupport at a point in advance of the axis of rotation of said circularwork support, an edge gage adjacent said support, and a presser footbetween the work contacting portion of said feed wheel and said edgegage, said foot being engageable against the margin of said work toprevent its upward curling when said feed wheel is in driving contactwith said Work.

5. A machine for operating on rounded sole blanks comprising an edgegage; means for supporting a blank and automatically forcing its edgeagainst said edge gage, said means consisting in a freely rotatablecircular disc having a. flat side facing upwardly to provide a work'support, a driven feed wheel located above said support for peripheralcontact with work seated thereon at a point in advance of the axis ofrotation of said support; and a knife located above said support in thepath of work fed past said gage.

6. A machine for operating on rounded sole blanks comprising an edgegage; means for supporting a blank and automatically forcing its edgeagainst said edge gage, said means consisting in a circular work supportfreely rotatable about a vertical axis and a driven feed wheel rptatableabout a horizontal axis in position .to contact work seated on saidsupport, the axis of said feed wheel being located in advance of thework support axis; and a knife located above said support in the path ofwork fedpast said gage.

7. A machine for operating on rounded sole blanks comprising a head; anedge gage; means for supporting a blank and automatically forcing itsedge against said edge gage, said means consisting in a circular worksupport freely rotatable on said head about a vertical axis, and adriven feed wheel pivotally mounted on said head and having meansclamping it against work seated on said support at a point in advance ofthe axis of such support; and a knife located above said support inthepath of work fed past said gage.

8. A machine for operating on rounded sole blanks comprising a head; anedge gage on said head; a knife on said head in the path of work fedpast said gage; a member pivotally mounted on said head; means forsupporting a blank and automatically forcing its edge against said edgegage, said means consisting in a circular work support freely rotatableon said head about a vertical axis and a driven feed wheel mounted onsaid member for rotation about a horizontal axis inpositiorgperipherally to engage work seated on said support at a pointin advance of said support axis; and spring means normally urging saidwheel toward said support.

WILLIAM C. CARD, JR.

